/*
 * Copyright (c) 2011 PonySDK
 *  Owners:
 *  Luciano Broussal  <luciano.broussal AT gmail.com>
 *  Mathieu Barbier   <mathieu.barbier AT gmail.com>
 *  Nicolas Ciaravola <nicolas.ciaravola.pro AT gmail.com>
 *  
 *  WebSite:
 *  http://code.google.com/p/pony-sdk/
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

package com.ponysdk.core.servlet;

import javax.servlet.ServletException;

import com.ponysdk.core.UIContext;
import com.ponysdk.core.event.EventBus;
import com.ponysdk.core.event.SimpleEventBus;
import com.ponysdk.core.main.EntryPoint;
import com.ponysdk.ui.server.basic.PHistory;

/**
 * The server side implementation of the RPC service.
 */
@SuppressWarnings("serial")
public class HttpServlet extends AbstractHttpServlet {

    private String entryPointClassName;

    @Override
    public void init() throws ServletException {
        super.init();

        if (entryPointClassName == null || entryPointClassName.isEmpty()) entryPointClassName = getServletConfig().getInitParameter("entryPoint");
        if (entryPointClassName == null || entryPointClassName.isEmpty()) throw new ServletException("The entry point must be defined in your web.xml.");
    }

    @Override
    protected AbstractApplicationManager createApplicationManager() {
        return new AbstractApplicationManager() {

            @Override
            protected EntryPoint initializePonySession(final UIContext ponySession) throws ServletException {
                EntryPoint entryPoint = null;
                // final String entryPointClassName = getServletConfig().getInitParameter("entryPoint");
                try {
                    final ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
                    final Class<?> clazz = classLoader.loadClass(entryPointClassName);
                    entryPoint = (EntryPoint) clazz.newInstance();
                } catch (final ClassNotFoundException e) {
                    throw new ServletException("Unable to load the entry point #" + entryPointClassName + " from the classpath.", e);
                } catch (final Exception e) {
                    throw new ServletException("Failed to instantiate the entry point #" + entryPointClassName, e);
                }

                final EventBus rootEventBus = new SimpleEventBus();

                final PHistory history = new PHistory();

                ponySession.setRootEventBus(rootEventBus);
                ponySession.setHistory(history);

                // final PCookies cookies = new PCookies(data.getString(PROPERTY.COOKIE));
                // ponySession.setCookies(cookies);

                return entryPoint;
            }
        };
    }

    public void setEntryPointClassName(final String entryPointClassName) {
        this.entryPointClassName = entryPointClassName;
    }
}
